CVE-2008-7123: Static code injection vulnerability in admin/configuration/modifier.php in zKup CMS 2.0 through 2.3 allows rem

Q: How do I fix CVE-2008-7123?

zkup: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2008-7123 being exploited?

CVE-2008-7123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2008-7123 affect?

CVE-2008-7123 affects zkup. Severity is medium (CVSS 6.8). Static code injection vulnerability in admin/configuration/modifier.php in zKup CMS 2.0 through 2.3 allows remote attackers to inject arbitrary PHP code into fichiers/config.php via a null byte (%00) in the login parameter in an ajout actio

Q: How urgent is CVE-2008-7123?

Priority 51/100. EPSS top 9%: very likely to be exploited; Public exploit reference

This month

MEDIUM 6.8DOWNGRADE

CVE-2008-7123 is a medium-severity flaw (CVSS 6.8) affecting zkup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Static code injection vulnerability in admin/configuration/modifier.php in zKup CMS 2.0 through 2.3 allows remote attackers to inject arbitrary PHP code into fichiers/config.php via a null byte (%00) in the login parameter in an ajout action, which bypasses the regular expression check.

Why this priority

EPSS top 9%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-94
Published	2009-08-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: zkup

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-08-31 10:30 UTCPublished CVE record published
2026-06-16 23:03 UTCUpdated Record last modified

zkup zkup DOWNGRADE

Affected: 2.0 · 2.01 · 2.02 · 2.03

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy zkup || rpm -q zkup || zkup --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison zkup sudo apt install zkup=<VERSION_BEFORE_2.0> sudo apt-mark hold zkup

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zkup sudo dnf downgrade zkup-<VERSION_BEFORE_2.0> sudo dnf versionlock add zkup

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: zKup CMS 2.0 < 2.3 - Arbitrary File Upload

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2008-7123?

zkup: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2008-7123 being exploited?

CVE-2008-7123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2008-7123 affect?

CVE-2008-7123 affects zkup. Severity is medium (CVSS 6.8). Static code injection vulnerability in admin/configuration/modifier.php in zKup CMS 2.0 through 2.3 allows remote attackers to inject arbitrary PHP code into fichiers/config.php via a null byte (%00) in the login parameter in an ajout actio

How urgent is CVE-2008-7123?

Priority 51/100. EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-7124 HIGH 7.5 DOWNGRADE zKup CMS 2.0 through 2.3 does not require administrative authentication for admin/configuration/modifier.php,

References

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